Gauge Threshold Corrections for Local String Models
Abstract
We study gauge threshold corrections for local brane models embedded in a large compact space. A large bulk volume gives important contributions to the Konishi and super-Weyl anomalies and the effective field theory analysis implies the unification scale should be enhanced in a model-independent way from M_s to R M_s. For local D3/D3 models this result is supported by the explicit string computations. In this case the scale R M_s comes from the necessity of global cancellation of RR tadpoles sourced by the local model. We also study D3/D7 models and discuss discrepancies with the effective field theory analysis. We comment on phenomenological implications for gauge coupling unification and for the GUT scale.
Cite
@article{arxiv.0901.4350,
title = {Gauge Threshold Corrections for Local String Models},
author = {Joseph P. Conlon},
journal= {arXiv preprint arXiv:0901.4350},
year = {2009}
}
Comments
30 pages; v2: references added, minor typos corrected